A bright waterborne polyurethane and a preparation system thereof

Abstract

The application discloses a kind of bright water-based polyurethane and preparation system thereof, it is related to polyurethane technical field, it is composed of A component and B component;Wherein A component includes: low hydroxyl value water-based acrylic resin, dispersing agent, defoaming agent, leveling agent, pigment, filler, film-forming aid, white carbon black, catalyst, anti-settling agent, thickening agent, deionized water, ultraviolet absorber, adhesion promoter;The B component includes: isocyanate curing agent, cosolvent.The application utilizes ultraviolet absorber to aim at sunlight aging in natural environment, and utilizes adhesion promoter to strengthen adhesion capacity, so that it is not prone to discoloration, prolongs service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyurethane, in particular to a bright water-based polyurethane and a preparation system thereof. BACKGROUND

[0002] The bright resin is a kind of resin commonly used in fabric printing adhesive production, which can give the printing surface a bright appearance, and also can give a certain hand feeling. Most of the existing bright resins are solvent-based polyurethane resins, which are prepared by diluting with solvent and adding various additives;

[0003] Water-based solid color topcoat is mostly concentrated in water-based acrylic polyurethane topcoat of water-based acrylic emulsion, and a few other water-based emulsions. The performances of these topcoats are different and have large differences. The water resistance, compactness and adhesion are poor, which cannot adapt to relatively harsh environments, and the yellowing is easy when the sunlight is large. The wetting performance of pigments is poor. SUMMARY

[0004] The purpose of the present application is to provide a bright water-based polyurethane and a preparation system thereof to solve the above problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a bright water-based polyurethane is composed of A component and B component; wherein the A component comprises: by mass fraction, low hydroxyl value water-based acrylic resin 50-65 parts, dispersing agent 0.2-0.8 parts, defoaming agent 0.3-0.5 parts, leveling agent 0.1-0.3 parts, pigment 5-10 parts, filler 5-10 parts, film forming aid 3-5 parts, white carbon black 5-8 parts, catalyst 0.1-0.15 parts, anti-settling agent 0.5-2 parts, thickening agent 0.2-0.8 parts, deionized water 5-10 parts, ultraviolet absorber 1-2 parts, adhesion promoter 1-3 parts; the B component comprises: by mass fraction, isocyanate curing agent 60-70 parts, cosolvent 30-40 parts.

[0006] A bright water-based polyurethane preparation system is used to manufacture the above-mentioned bright water-based polyurethane, which comprises a reaction kettle and a sand mill. The sand mill comprises a base and a driving mechanism arranged on the base. A rotating shaft is rotatably installed on the base and is driven by the driving mechanism. A frame is fixedly installed on the rotating shaft. A middle rod is rotatably installed on the frame. A blocking plate is rotatably arranged on the middle rod. When the driving mechanism drives the rotating shaft to rotate in the grinding cylinder, the frame will drive the grinding balls in the grinding cylinder to roll and impact and grind the material. At the same time, the rotation of the frame will drive the middle rod to rotate passively. At this time, the middle rod will drive a plurality of blocking plates to rotate. With the rotation of the plurality of blocking plates, the two adjacent blocking plates will swing slightly and grind the material passing through the grinding channel between them.

[0007] As preferred, a circular ring is rotatably installed on the middle rod, the blocking plates are fixedly installed on the circular ring, an inclined slot is formed on the circular ring, a sliding rod is slidably installed on the middle rod, and a first protruding rod with a size matching that of the inclined slot is fixedly installed on the sliding rod.

[0008] Circumferential rotation of the middle rod will make the sliding rod reciprocally move on the surface of the middle rod, and the reciprocating movement of the sliding rod will drive the adjacent two blocking plates to reciprocally swing in opposite directions.

[0009] As preferred, a connecting block is fixedly installed on the frame, the middle rod penetrates through the connecting block, a second protruding rod is fixedly installed on the sliding rod, an annular groove is formed on the connecting block, and the annular groove is wavy.

[0010] As preferred, a plurality of grinding blocks are fixedly installed on the side wall of the blocking plate.

[0011] As preferred, a protruding block is fixedly installed on the inner wall of the circular ring, and a recess with a size matching that of the protruding block is formed on the middle rod.

[0012] As preferred, the driving mechanism comprises a servo motor fixedly installed in the base, a first gear fixedly installed at the output end of the servo motor, a second gear fixedly installed on the rotating shaft and engaged with the first gear, a fixed shaft fixedly installed in the base, a first bevel gear fixedly installed on the surface of the fixed shaft, a fixed rod fixedly installed on the frame, a connecting rod rotatably installed in the fixed rod, third bevel gears fixedly installed at both ends of the connecting rod, and a second bevel gear fixedly installed on the middle rod.

[0013] As preferred, side bevel gears are fixedly installed at both ends of the middle rod, and four middle rods are provided, and adjacent two middle rods are engaged through the side bevel gears at both ends.

[0014] As preferred, a plurality of grinding blocks are arranged along the long edges of the blocking plates, and two groups of grinding blocks between adjacent two blocking plates are staggered in the horizontal direction and the vertical direction.

[0015] As preferred, the cross-sectional size of the opening at both ends of the grinding channel is greater than the cross-sectional size of the middle.

[0016] In the above technical solution, the present application provides a bright waterborne polyurethane and a preparation system thereof, which have the following beneficial effects: the use of the ultraviolet absorber can resist the sunlight aging in the natural environment, and the use of the adhesion promoter can enhance the adhesion capacity, so that the bright waterborne polyurethane is not easy to discolor and has a long service life. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by persons of ordinary skill in the art based on these drawings.

[0018] Figure 1 The schematic diagram of the three-dimensional structure provided by the embodiment of the present application is shown in the figure.

[0019] Figure 2 The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure. Figure 1

[0020] Figure 3 The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure.

[0021] Figure 4 The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure.

[0022] Figure 5 The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure.

[0023] Figure 6 The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure.

[0024] Figure 7 The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure.

[0025] Figure 8 The schematic diagram of the structure at A of the embodiment of the present application is shown in the figure. Figure 7

[0026] The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure. Figure 9

[0027] The schematic diagram of the structure at B of the embodiment of the present application is shown in the figure. Figure 10 Figure 4 The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure.

[0028] Figure 11 The schematic diagram of the partial structure of the embodiment of the present application is shown in the figure.

[0029] Explanation of reference signs:

[0030] ​​1, base; 2, grinding cylinder; 3, side slide rail; 41, servo motor; 42, first gear; 43, second gear; 44, rotating shaft; 45, fixed shaft; 51, first bevel gear; 52, second bevel gear; 53, connecting rod; 54, fixed rod; 55, third bevel gear; 61, middle rod; 62, side bevel gear; 63, slide rod; 631, first protruding rod; 632, second protruding rod; 64, blocking plate; 641, grinding block; 642, over-grinding channel; 65, circular ring; 651, protruding block; 652, inclined groove; 71, frame; 72, connecting block; 721, ring groove. DETAILED DESCRIPTION

[0031] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0032] Please refer to Figures 1-11 A kind of bright waterborne polyurethane and its preparation system, consisting of A component and B component;

[0033] Wherein A component includes: by mass fraction, low hydroxyl value waterborne acrylic resin 50-65 parts, dispersing agent 0.2-0.8 parts, defoaming agent 0.3-0.5 parts, leveling agent 0.1-0.3 parts, pigment 5-10 parts, filler 5-10 parts, film-forming aid 3-5 parts, white carbon black 5-8 parts, catalyst 0.1-0.15 parts, anti-sedimentation agent 0.5-2 parts, thickening agent 0.2-0.8 parts, deionized water 5-10 parts, ultraviolet absorber 1-2 parts, adhesion promoter 1-3 parts;

[0034] B component includes: by mass fraction, isocyanate curing agent 60-70 parts, cosolvent 30-40 parts.

[0035] A kind of bright waterborne polyurethane preparation system, it is used to manufacture the above-mentioned bright waterborne polyurethane, including reaction kettle and sand mill, sand mill includes base 1 and the driving mechanism arranged on base 1, rotatingly installed with rotating shaft 44 on base 1, rotating shaft 44 accepts the drive of driving mechanism, fixedly installed with frame 71 on rotating shaft 44, rotatingly installed with middle rod 61 on frame 71, rotatingly arranged with blocking plate 64 on middle rod 61;

[0036] When the driving mechanism drives rotating shaft 44 to rotate in grinding cylinder 2, frame 71 will drive the grinding ball in grinding cylinder 2 to roll and impact grind the material, while the rotation of frame 71 will drive middle rod 61 to rotate passively, at this time, middle rod 61 will drive several blocking plates 64 to rotate, and with the rotation of several blocking plates 64, two adjacent blocking plates 64 will swing slightly and grind the material passing through the over-grinding channel 642 between them;

[0037] Wherein, the driving mechanism is started, at this time, the driving mechanism will drive the rotating shaft 44 to rotate, with the rotation of the rotating shaft 44, it will drive the frame 71 to rotate, when the material is ground, the material is passed into the grinding cylinder 2 through the feed inlet and flows out at the discharge port, with the entry of the material, at this time, the rotating frame 71 will drive the several grinding balls in the grinding cylinder 2 to move and impact the material in the grinding cylinder 2, so that the material receives the shear force, friction force and other effects generated by the collision of the grinding balls to achieve the effect of grinding the material, and with the rotation of the middle rod 61, the blocking plate 64 on it will also surge the fluid material in the grinding cylinder 2, and the rotation direction of the blocking plate 64 is perpendicular to the flow direction of the material, so that when the material is pushed by the blocking plate 64, it will be turned from front to back, so that the material is ground more times in the grinding cylinder 2, and with the rotation of the blocking plate 64, the grinding channel 642 between the two blocking plates 64 will pass through the material, and at this time, the adjacent two blocking plates 64 reciprocate in opposite directions, so that the passing material is further ground, and the rotating blocking plate 64 makes the grinding balls move back and forth in the grinding cylinder 2, avoiding being gathered in the back along the flow direction of the fluid material;

[0038] Wherein, the reaction kettle is used for mixing and stirring the components, and then the sand mill is used for sand grinding to a fineness of ≤20μm.

[0039] Wherein, the side slide rail 3 is fixedly installed on the base 1, and the grinding cylinder 2 is slidingly installed on the side slide rail 3, and the grinding cylinder 2 and the base 1 are screw-connected.

[0040] In another embodiment of the application: the annular ring 65 is rotatably installed on the middle rod 61, the blocking plate 64 is fixedly installed on the annular ring 65, the inclined groove 652 is formed in the annular ring 65, the sliding rod 63 is slidingly installed on the middle rod 61, and the first protruding rod 631 with a size matched with the inclined groove 652 is fixedly installed on the sliding rod 63.

[0041] The circumferential rotation of the middle rod 61 will make the sliding rod 63 reciprocate on the surface of the middle rod 61, and with the reciprocation of the sliding rod 63, the adjacent two blocking plates 64 will reciprocate in opposite directions;

[0042] When the middle rod 61 rotates on the frame body 71, the slide rod 63 on the middle rod 61 slides along the axial direction, the first protruding rod 631 on the slide rod 63 is inserted into the inclined groove 652, and the slide rod 63 drives the first protruding rod 631 to move, so that the first protruding rod 631 drives the annular ring 65 to rotate slightly by extruding the inner wall of the inclined groove 652, and the reciprocating movement of the slide rod 63 drives the annular ring 65 to reciprocate slightly, so that the blocking plate 64 reciprocates slightly, the directions of the inclined grooves 652 on the two adjacent annular rings 65 are opposite, so that the two annular rings 65 rotate in opposite directions when the slide rod 63 drives the first protruding rod 631 to move, so that the two adjacent blocking plates 64 reciprocate and rub, and the grinding passage 642 between the two adjacent blocking plates 64 is used for the fluid material to pass through, when the blocking plate 64 rotates with the middle rod 61, the material passes through the grinding passage 642 between the two blocking plates 64, and the two adjacent blocking plates 64 grind the material passing through the grinding passage 642 again, so that the grinding degree of the material is better.

[0043] When the material enters the grinding cylinder 2 and flows in the grinding cylinder 2, the grinding balls are easy to move with the material, so that the grinding balls are concentrated at the tail end of the grinding cylinder 2, the rotation of the rotating shaft 44 is affected, and the flow of the material is also affected, and when the plurality of middle rods 61 drive the blocking plates 64 to rotate in the grinding cylinder 2 perpendicular to the flow direction of the material, the grinding balls in the grinding cylinder 2 are stirred, so that the grinding balls flow from the rear to the front and are dispersed in the whole grinding cylinder 2, and the concentration of the grinding balls is avoided.

[0044] In another embodiment of the application, the connecting block 72 is fixedly installed on the frame body 71, the middle rod 61 penetrates through the connecting block 72, the second protruding rod 632 is fixedly installed on the slide rod 63, the ring groove 721 is formed in the connecting block 72, and the ring groove 721 is in a wave shape.

[0045] When the middle rod 61 rotates, the slide rod 63 rotates synchronously, the second protruding rod 632 on the slide rod 63 moves in the wave-shaped ring groove 721, the slide rod 63 reciprocates along the axial direction of the middle rod 61, and the annular ring 65 reciprocates.

[0046] In another embodiment of the application, the side wall of the blocking plate 64 is fixedly installed with a plurality of grinding blocks 641.

[0047] The grinding blocks 641 between the two adjacent blocking plates 64 make the material contact and grind the grinding blocks 641 when the material passes through the grinding passage 642 between the two blocking plates 64, so that the material is better refined, and the grinding effect is improved.

[0048] In another embodiment of the present application: the inner wall of the circular ring 65 is fixedly installed with a protrusion 651, and the middle rod 61 is provided with a groove matching the size of the protrusion 651;

[0049] The protrusion 651 is arranged in the groove, and the circular ring 65 rotates on the surface of the middle rod 61 through the cooperation of the protrusion 651 and the groove.

[0050] In another embodiment of the present application: the driving mechanism comprises a servo motor 41 fixedly installed in the base 1, the output end of the servo motor 41 is fixedly installed with a first gear 42, the rotating shaft 44 is fixedly installed with a second gear 43 engaged with the first gear 42, the base 1 is fixedly installed with a fixed shaft 45, the surface of the fixed shaft 45 is fixedly installed with a first bevel gear 51, the frame 71 is fixedly installed with a fixed rod 54, the inside of the fixed rod 54 is rotatably installed with a connecting rod 53, both ends of the connecting rod 53 are fixedly installed with a third bevel gear 55, and the middle rod 61 is fixedly installed with a second bevel gear 52;

[0051] When the connecting frame rotates with the rotating shaft 44, the third bevel gear 55 close to the first bevel gear 51 of the connecting rod 53 will engage with the first bevel gear 51 to rotate, at this time, the connecting rod 53 will drive the second bevel gear 52 to rotate through the third bevel gear 55 at the other end, and at this time, the second bevel gear 52 will drive the middle rod 61 to rotate, so that when the rotating shaft 44 drives the frame 71 to move the grinding balls in the grinding cylinder 2, the middle rod 61 will rotate synchronously to drive the several blocking plates 64 to rotate.

[0052] In another embodiment of the present application: the two ends of the middle rod 61 are fixedly installed with side bevel gears 62, and four middle rods 61 are arranged, and the two adjacent middle rods 61 are engaged through the side bevel gears 62 at the two ends;

[0053] When the middle rod 61 penetrating through the fixed rod 54 rotates and is driven by the first bevel gear 51 and the third bevel gear 55, it will drive the other three middle rods 61 to rotate synchronously.

[0054] In another embodiment of the present application: the several grinding blocks 641 are arranged along the long edges of the blocking plates 64, and the two groups of grinding blocks 641 between the two adjacent blocking plates 64 are arranged staggered in the horizontal direction and the vertical direction;

[0055] When the two adjacent blocking plates 64 swing away from each other, the two groups of grinding blocks 641 staggered between the two blocking plates 64 will move away, at this time, the material passing through the grinding passage 642 is not easily restricted by the grinding blocks 641, and when the two blocking plates 64 move towards each other, the two groups of grinding blocks 641 will further extrude and crush the material particles in the grinding passage 642.

[0056] In another embodiment of the present application: the cross-sectional size of the opening of the over-grinding channel 642 at both ends is larger than the cross-sectional size of the middle part;

[0057] When the middle rod 61 drives the blocking plate 64 to rotate, the fluid material will pass through the over-grinding channel 642 as the blocking plate 64 rotates. Since the cross-sectional size of the opening of the over-grinding channel 642 at both ends is larger, the size of the over-grinding channel 642 at the middle part is smaller, thereby extruding the material, so that the grinding of the material is more sufficient.

[0058] The above only describes certain exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of the claims of the present application.

Claims

1. A system for preparing glossy waterborne polyurethane, used to manufacture glossy waterborne polyurethane, said glossy waterborne polyurethane being composed of component A and component B; wherein component A comprises: By weight, the composition comprises: 50-65 parts of low hydroxyl value waterborne acrylic resin, 0.2-0.8 parts of dispersant, 0.3-0.5 parts of defoamer, 0.1-0.3 parts of leveling agent, 5-10 parts of pigment, 5-10 parts of filler, 3-5 parts of film-forming aid, 5-8 parts of silica, 0.1-0.15 parts of catalyst, 0.5-2 parts of anti-settling agent, 0.2-0.8 parts of thickener, 5-10 parts of deionized water, 1-2 parts of ultraviolet absorber, and 1-3 parts of adhesion promoter; Component B comprises: by weight, 60-70 parts of isocyanate curing agent and 30-40 parts of co-solvent, characterized in that: The equipment includes a reaction vessel and a sand mill. The sand mill includes a base (1) and a drive mechanism mounted on the base (1). A rotating shaft (44) is rotatably mounted on the base (1). The rotating shaft (44) is driven by the drive mechanism. A frame (71) is fixedly mounted on the rotating shaft (44). A central rod (61) is rotatably mounted on the frame (71). A baffle plate (64) is rotatably mounted on the central rod (61). When the drive mechanism drives the rotating shaft (44) to rotate inside the grinding cylinder (2), the frame (71) will cause the grinding balls inside the grinding cylinder (2) to roll and impact and grind the material. At the same time, the rotation of the frame (71) will cause the middle rod (61) to rotate passively. At this time, the middle rod (61) will cause several baffles (64) to rotate. As several baffles (64) rotate, two adjacent baffles (64) will swing slightly and grind the material passing through the grinding channel (642) between them. A ring (65) is rotatably mounted on the central rod (61), and a baffle plate (64) is fixedly mounted on the ring (65). A groove (652) is provided on the ring (65), and a slide rod (63) is slidably mounted on the central rod (61). A first protruding rod (631) that matches the size of the groove (652) is fixedly mounted on the slide rod (63). The circumferential rotation of the central rod (61) will cause the slide rod (63) to reciprocate on the surface of the central rod (61), and the reciprocating movement of the slide rod (63) will drive the two adjacent baffles (64) to swing back and forth in opposite directions.

2. The glossy waterborne polyurethane preparation system according to claim 1, characterized in that, A connecting block (72) is fixedly installed on the frame (71), the middle rod (61) rotates through the connecting block (72), a second protruding rod (632) is fixedly installed on the slide rod (63), and an annular groove (721) is opened on the connecting block (72), the annular groove (721) is wavy.

3. The glossy waterborne polyurethane preparation system according to claim 1, characterized in that, Several grinding blocks (641) are fixedly installed on the side wall of the baffle plate (64).

4. The glossy waterborne polyurethane preparation system according to claim 1, characterized in that, The inner wall of the ring (65) is fixedly installed with a protrusion (651), and the middle rod (61) has a groove that matches the size of the protrusion (651).

5. The glossy waterborne polyurethane preparation system according to claim 1, characterized in that, The drive mechanism includes a servo motor (41) fixedly installed in the base (1), a first gear (42) fixedly installed at the output end of the servo motor (41), a second gear (43) meshing with the first gear (42) fixedly installed on the rotating shaft (44), a fixed shaft (45) fixedly installed in the base (1), a first bevel gear (51) fixedly installed on the surface of the fixed shaft (45), a fixed rod (54) fixedly installed on the frame (71), a connecting rod (53) rotatably installed inside the fixed rod (54), a third bevel gear (55) fixedly installed at both ends of the connecting rod (53), and a second bevel gear (52) fixedly installed on the middle rod (61).

6. The glossy waterborne polyurethane preparation system according to claim 5, characterized in that, Both ends of the middle rod (61) are fixedly installed with side bevel gears (62). There are four middle rods (61), and two adjacent middle rods (61) mesh with each other through the side bevel gears (62) at both ends.

7. The glossy waterborne polyurethane preparation system according to claim 3, characterized in that, Several grinding blocks (641) are arranged along the long edge of the baffle (64), and the two sets of grinding blocks (641) between two adjacent baffles (64) are staggered in both the horizontal and vertical directions.

8. The glossy waterborne polyurethane preparation system according to claim 1, characterized in that, The cross-sectional dimensions of the openings at both ends of the over-grinding channel (642) are larger than the cross-sectional dimensions in the middle.

Images